16685007869 has 2 divisors, whose sum is σ = 16685007870. Its totient is φ = 16685007868.

The previous prime is 16685007847. The next prime is 16685007893. The reversal of 16685007869 is 96870058661.

It is a happy number.

16685007869 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 11785707844 + 4899300025 = 108562^2 + 69995^2 .

It is a cyclic number.

It is not a de Polignac number, because 16685007869 - 2²⁰ = 16683959293 is a prime.

It is a super-3 number, since 3×16685007869³ (a number of 32 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (16685007169) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8342503934 + 8342503935.

It is an arithmetic number, because the mean of its divisors is an integer number (8342503935).

Almost surely, 2^16685007869 is an apocalyptic number.

It is an amenable number.

16685007869 is a deficient number, since it is larger than the sum of its proper divisors (1).

16685007869 is an equidigital number, since it uses as much as digits as its factorization.

16685007869 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 4354560, while the sum is 56.

The spelling of 16685007869 in words is "sixteen billion, six hundred eighty-five million, seven thousand, eight hundred sixty-nine".